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Neutron Diffraction Study of Residual Stresses in a W-Ni-Co Heavy Alloy Processed by Rotary Swaging at Room and High Temperatures

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F21%3A10248063" target="_blank" >RIV/61989100:27360/21:10248063 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/61389005:_____/22:00541443

  • Výsledek na webu

    <a href="https://link.springer.com/article/10.1007%2Fs12540-020-00963-8" target="_blank" >https://link.springer.com/article/10.1007%2Fs12540-020-00963-8</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1007/s12540-020-00963-8" target="_blank" >10.1007/s12540-020-00963-8</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Neutron Diffraction Study of Residual Stresses in a W-Ni-Co Heavy Alloy Processed by Rotary Swaging at Room and High Temperatures

  • Popis výsledku v původním jazyce

    Residual stresses were studied in tungsten heavy alloy bars produced by powder metallurgy and deformed by rotary swaging at room temperature (RT) and at 900 degrees C. Neutron diffraction technique was used to scan the residual stresses across the bars. Both tungsten particles and NiCo2W solid solution matrix were analysed. Maximum axial stresses of similar to 300 MPa and similar to 200 MPa were observed for the tungsten phase at the centre in the RT and in the high-temperature deformed samples, respectively. Compressive residual axial stresses were found close to the sample surface, showing that rotary swaging is a suitable deformation method for tungsten heavy alloys to provide an appropriate surface modification for its use in metallic parts undergoing, e.g., fatigue. Residual stresses developed in the NiCo2W-phase are larger than those found in the tungsten particles although with a secondary role in the overall equilibrium conditions due to its lower strength and smaller volume fraction. Total stresses for each phase were separated into macro- and microstresses. Macrostresses can be mainly influenced by the incompatibility of the elliptical cross-section of the sintered sample with the head of the rotary machine while microstresses are mainly developed by the elastic mismatch between the constituent phases.

  • Název v anglickém jazyce

    Neutron Diffraction Study of Residual Stresses in a W-Ni-Co Heavy Alloy Processed by Rotary Swaging at Room and High Temperatures

  • Popis výsledku anglicky

    Residual stresses were studied in tungsten heavy alloy bars produced by powder metallurgy and deformed by rotary swaging at room temperature (RT) and at 900 degrees C. Neutron diffraction technique was used to scan the residual stresses across the bars. Both tungsten particles and NiCo2W solid solution matrix were analysed. Maximum axial stresses of similar to 300 MPa and similar to 200 MPa were observed for the tungsten phase at the centre in the RT and in the high-temperature deformed samples, respectively. Compressive residual axial stresses were found close to the sample surface, showing that rotary swaging is a suitable deformation method for tungsten heavy alloys to provide an appropriate surface modification for its use in metallic parts undergoing, e.g., fatigue. Residual stresses developed in the NiCo2W-phase are larger than those found in the tungsten particles although with a secondary role in the overall equilibrium conditions due to its lower strength and smaller volume fraction. Total stresses for each phase were separated into macro- and microstresses. Macrostresses can be mainly influenced by the incompatibility of the elliptical cross-section of the sintered sample with the head of the rotary machine while microstresses are mainly developed by the elastic mismatch between the constituent phases.

Klasifikace

  • Druh

    J<sub>imp</sub> - Článek v periodiku v databázi Web of Science

  • CEP obor

  • OECD FORD obor

    20501 - Materials engineering

Návaznosti výsledku

  • Projekt

    Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

  • Návaznosti

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Ostatní

  • Rok uplatnění

    2021

  • Kód důvěrnosti údajů

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Údaje specifické pro druh výsledku

  • Název periodika

    Metals and Materials International

  • ISSN

    1598-9623

  • e-ISSN

  • Svazek periodika

    neuveden

  • Číslo periodika v rámci svazku

    march

  • Stát vydavatele periodika

    KR - Korejská republika

  • Počet stran výsledku

    12

  • Strana od-do

  • Kód UT WoS článku

    000631486800001

  • EID výsledku v databázi Scopus

    2-s2.0-85103155498